sprinkler buddy presentation #9: “layout and a new feature” 4/4/2007 team m3 panchalam ramanujan...
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![Page 1: Sprinkler Buddy Presentation #9: “Layout and a New Feature” 4/4/2007 Team M3 Panchalam Ramanujan Sasidhar Uppuluri Devesh Nema Kalyan Kommineni Kartik](https://reader031.vdocuments.mx/reader031/viewer/2022020721/56649d7e5503460f94a615d4/html5/thumbnails/1.jpg)
Sprinkler Buddy
Presentation #9:
“Layout and a
New Feature”
4/4/2007
Team M3Panchalam Ramanujan
Sasidhar UppuluriDevesh Nema
Kalyan KommineniKartik Murthy
Design Manager: Bowei Gai
“Low Cost Irrigation Management For Everyone ! ”
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Current Status Determine Project Develop Project Specifications Plan Architectural Design
Determination of all components in design Detailed logical flowchart
Design a Floor Plan Create Structural Verilog Make Transistor Level Schematic Layout
(~85% done..all modules LVS, Some Global Routed, FSMs are incomplete)
Testing (Extraction, LVS, and Analog Sim.) Glitches removed from all logic
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Updated Design SizeBlock (# used) Size (um)
40:20 Muxes (4) 20 x 80
60:20 Muxes (2) 20 x 120
Counter (2) 12 x 17
KC ROM (4 parts) 181 x 8
P ROM (1) 70 x 8
Metric Storage SRAMS (2)
181 x 60
Constant Storage ROM (1)
181 x 8
Floating Point Adder (4)
96x151
Floating Point Multiplier (2)
89 x 40
10 Bit Registers (8) 50 x 10
• 362um x 361 um• ~ 1 : 1.0001 aspect ratio• .129 mm^2 area• .232 Density
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Layout: Progress
All Big Modules LVS Separate Operation Modes wired
Hourly Update, Computation Mode, and Feed Back are done
Daily Update is wired with the exception of the feedback loop
3/6 FSMs are not complete Sizes estimated Space left
![Page 5: Sprinkler Buddy Presentation #9: “Layout and a New Feature” 4/4/2007 Team M3 Panchalam Ramanujan Sasidhar Uppuluri Devesh Nema Kalyan Kommineni Kartik](https://reader031.vdocuments.mx/reader031/viewer/2022020721/56649d7e5503460f94a615d4/html5/thumbnails/5.jpg)
Layout : Entire Chip
![Page 6: Sprinkler Buddy Presentation #9: “Layout and a New Feature” 4/4/2007 Team M3 Panchalam Ramanujan Sasidhar Uppuluri Devesh Nema Kalyan Kommineni Kartik](https://reader031.vdocuments.mx/reader031/viewer/2022020721/56649d7e5503460f94a615d4/html5/thumbnails/6.jpg)
Power Logic
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Gating Sections
Chip separated into 7 virtual VDD/GND sections1 in HU, 3 in DU, 3 in CMDistributes load and reduces power rail
bounce
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Power Rail Bounce
“Understanding and Minimizing Ground Bounce During Mode Transition of Power Gating Structures”, Kim et al
![Page 9: Sprinkler Buddy Presentation #9: “Layout and a New Feature” 4/4/2007 Team M3 Panchalam Ramanujan Sasidhar Uppuluri Devesh Nema Kalyan Kommineni Kartik](https://reader031.vdocuments.mx/reader031/viewer/2022020721/56649d7e5503460f94a615d4/html5/thumbnails/9.jpg)
Hourly Update Operation
![Page 10: Sprinkler Buddy Presentation #9: “Layout and a New Feature” 4/4/2007 Team M3 Panchalam Ramanujan Sasidhar Uppuluri Devesh Nema Kalyan Kommineni Kartik](https://reader031.vdocuments.mx/reader031/viewer/2022020721/56649d7e5503460f94a615d4/html5/thumbnails/10.jpg)
Daily Update Operation
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Computation Operation
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Approximate Savings Components that remain on
Feedback Mode (3407T)Registers (1944T)FSMs (1514T)SRAMs (4304T)
63.1% of all Transistors are shut off most of the day
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Layout : Power Gate Transistors
Density: .05 transistors/um2
V DD Gating
![Page 14: Sprinkler Buddy Presentation #9: “Layout and a New Feature” 4/4/2007 Team M3 Panchalam Ramanujan Sasidhar Uppuluri Devesh Nema Kalyan Kommineni Kartik](https://reader031.vdocuments.mx/reader031/viewer/2022020721/56649d7e5503460f94a615d4/html5/thumbnails/14.jpg)
Layout : Power Gate Transistors
Density: .06 transistors/um2
GND Gating
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Design Challenges and Implementation
DecisionsFor The Past Week
Design Challenge
Translation to HW
Low Power • Power Gating to reduce leakage current• Sacrificed Density for Power Savings
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Problems/QuestionsFSM routing was much more complex
than expected
![Page 18: Sprinkler Buddy Presentation #9: “Layout and a New Feature” 4/4/2007 Team M3 Panchalam Ramanujan Sasidhar Uppuluri Devesh Nema Kalyan Kommineni Kartik](https://reader031.vdocuments.mx/reader031/viewer/2022020721/56649d7e5503460f94a615d4/html5/thumbnails/18.jpg)
For Next TimeFinish